Hey, I tried to make my first box tonight, double checked my math, it all worked out when the building was done. My dad helped me out. I am going to Paint it with some tan textured stuff to match the back of my range rover(got a new car). 2.3 ft^3 after displacement and tuned to 30 Hz. Gonna put a treo ssi 15" in there with a rockford 800.2 I will get more pics when i am done.